Abstract: Mineral fibers that exhibit a chemical composition comprising the following constituents, as percentages by weight: SiO2 57.0 to 60.0%, CaO 25.0 to 30.0%, MgO >8.0 to 10.0%, B2O3 2.5 to 6.0%, R2O up to 2.5% Al2O3 0 to 2.0%, and an R2O/B2O3 molar ratio of 0.20 to 0.60.

Abstract: A process for manufacturing insulating products based on mineral wool includes: the application, on mineral wool fibers, of a binder composition containing (a) at least one carbohydrate selected from reducing sugars, non-reducing sugars, hydrogenated sugars and a mixture thereof, and (b) at least one crosslinking agent for crosslinking the carbohydrate(s); the evaporation of the solvent phase of the binder composition; and the thermal curing of the non-volatile fraction of the composition. A polysaccharide-free oil-in-water emulsion comprising water, a mineral oil and from 0.5 to 5.0 parts by weight per 100 parts by weight of mineral oil of at least one preferably nonionic surfactant, is added to the binder composition, preferably immediately before the application thereof onto the mineral wool fibers, the mean diameter of the oil droplets of the oil-in-water emulsion, determined by laser diffraction particle size analysis, being greater than 5 ?m.

Abstract: The invention relates to an insulation product formed from at least two insulating layers containing aerogels, each of said layers comprising from 25 to 95 wt % of aerogel(s) and from 5 to 75 wt % of fibers, said insulating layers being joined together by means of an organic adhesive, advantageously aqueous, based on vinyl polymer(s). The invention also relates to a method for obtaining said product.

Abstract: An aqueous poly(furfuryl alcohol) solution contains: from 40% to 85% by weight of poly(furfuryl alcohol), from 15% to 60% by weight of water, and less than 1.5% by weight of furfuryl alcohol. The solution exhibits a pH of greater than 7.0, preferably of between 7.2 and 10.0. A process for the manufacture of a product based on mineral or organic fibers which are bonded by an organic binder can use such an aqueous poly(furfuryl alcohol) solution in the diluted form.

Abstract: A process for manufacturing a thermoset polyester foam includes the following successive steps: (a) providing an expandable and thermosetting composition containing a polyol component including at least one element selected from glycerol, diglycerol and glycerol oligomers; a polyacid component including citric acid; a surfactant selected from alkyl polyglycosides and mixtures of an anionic surfactant and a cationic surfactant, and an esterification catalyst; (b) introducing the expandable and thermosetting composition into a mold or applying the expandable composition to a support; and (c) heating the expandable and thermosetting composition at a temperature at least equal to 135° C. so as to react the polyol component with the polyacid component and form a block of thermoset polyester foam.

Abstract: A solar collector, in particular a solar thermal collector, is formed of at least one circuit transporting a heat transfer fluid, and includes at least one insulator, in particular in the form of at least one layer, formed of flakes and/or nodules of mineral wool(s) or mineral fibers. A process is provided for insulating or manufacturing a solar collector into which flakes and/or nodules of mineral wool(s) and/or mineral fibers are blown, as insulator, in particular without adding binder or water.

Abstract: A process for manufacturing an insulating product based on mineral fibers bonded by an organic binder includes applying an aqueous binding composition to mineral fibers: evaporating a solvent phase of the aqueous binding composition: and thermal curing of the nonvolatile residue of the composition. The aqueous binding composition includes at least one hydrogenated. sugar, at least one polyfunctional crosslinking agent, and hypophosphorous acid. The binding composition is free of reducing sugars or contains at most 10% by weight of reducing sugars.

Abstract: A method for determining a heat loss coefficient of a premises includes undertaking application of first and second heating powers, respectively, in the premises over two successive time periods, selecting for each of the first and second time periods, a time interval for which the evolution is substantially linear, determining the slope of the tangent to the curve (Tik(t))k=1 or 2 over each time interval; and deducing the value of the heat loss coefficient of the premises on the basis of the slopes.

Abstract: A panel for self-supporting ducts, in particular air-conditioning ducts, made up of a core of mineral wool or the like, covered on its external face and on its internal face with an exterior covering and an interior covering, respectively. The interior covering includes or preferably is made up of an aluminum sheet, a layer of a glass fabric or a layer of a glass web. The exterior covering includes the succession of a first layer of plastics material, an aluminum sheet, and a second layer of plastics material. The layers of plastics material are bonded to the aluminum sheet directly or via an adhesive. The exterior covering is bonded to the external surface of the core by glue.

Abstract: A process for manufacturing a solid thermoset foam includes the following successive stages: (a) providing an expandable and thermosetting composition including a first reactant chosen from reducing sugars and a second reactant chosen from primary amines, primary amine acid addition salts, secondary amines, secondary amine acid addition salts, and ammonium salts of formula Rn?(NH4+)n where n is an integer at least equal to 1 and Rn? represents the residue of an organic or inorganic acid; (b) introducing the expandable and thermosetting composition into a mold or applying the expandable composition to a support so as to form a film having a thickness at least equal to 1 mm; and (c) heating the expandable and thermosetting composition to a temperature at least equal to 140° C. to react the first reactant with the second reactant and to form, by polymerization and chemical foaming, a block of solid thermoset foam.

Abstract: A sizing composition for insulating products based on mineral wool, in particular glass or rock wool, which includes at least one ammonium lignosulfonate or alkali metal or alkaline earth metal salt of lignosulfonic acid, and at least one carbonyl compound of formula: R—[C(O)R1]x??(I) in which: R represents a saturated or unsaturated and linear, branched or cyclic hydrocarbon radical, a radical including one or more aromatic nuclei which consist of 5 or 6 carbon atoms, a radical including one or more aromatic heterocycles containing 4 or 5 carbon atoms and an oxygen, nitrogen or sulfur atom, it being possible for the R radical to contain other functional groups, in particular hydroxyl or alkoxy groups, especially methoxy groups, R1 represents a hydrogen atom or a C1-C10 alkyl radical, and x varies from 1 to 10.

Abstract: An apparatus for treating a mat of mineral fibers moving along a plane and a run direction, by detection and elimination of localized defects, includes a first transport member, a second transport member positioned after the first transport member in the run direction and separated therefrom in the run direction by a treatment zone, a device for detecting localized defects in the mat of mineral fibers, upstream of the treatment zone in the run direction, and in the treatment zone, a device for eliminating defects suitable for eliminating, in-line, a defect detected by the detection device by eliminating the portion of mat containing it.

Abstract: An oven for baking a thermally curable binder in a mat of mineral fibers, including plural compartments through which the mat of fibers passes successively, the mat being compressed and transported through the compartments by gas-permeable upper conveyors and lower conveyors, each compartment having a length along a direction of movement of the mat and including a mechanism introducing a hot air flow, located either below or above the fiber mat, and a mechanism extracting the air after having passed through the mat, respectively arranged either above or below the opposite face of the mat, so that the binder is progressively brought to a temperature higher than its curing temperature. In one compartment the mechanism introducing hot air includes air inlets that open partly on openings formed on a first lateral side of the compartment and partly on openings formed on the opposite lateral side of the compartment.

Abstract: The purpose of the present invention is to provide an inorganic fiber laminate having improved uniformity of surface density, as well as provide a vacuum insulation material using the same, and a manufacturing method for the same. The present invention relates to an inorganic fiber laminate (10) at least including a first inorganic fiber mat (1) that has a high-surface-density section (1a) and a low-surface-density section (1b), and a second inorganic fiber mat (2) that has a high-surface-density section (2a) and a low-surface-density section (2a), wherein the high-surface-density section (1a, 2a) of the first inorganic fiber mat (1) and/or the second inorganic fiber mat (2) are/is laminated on the low-surface-density section (1b) of the first inorganic fiber mat (1), and the high-surface-density section (1a, 2a) of the first inorganic fiber mat (1) and/or the second inorganic fiber mat are/is laminated on the low-surface-density section (2b) of the second inorganic fiber mat (2).

Abstract: At least one acoustic parameter of an environment is obtained by emitting a sound signal emitted, receiving a sound signal received, estimating a sampling frequency shift and of a temporal shift between the emission and reception devices on the basis of impulse responses obtained on the basis of portions of the sound signal received and of corresponding portions of the sound signal emitted, obtaining a corrected sound signal received by applying to the sound signal received a sampling frequency shift correction and a temporal shift correction on the basis of the estimating, determining the impulse response of the environment on the basis of portions of the corrected sound signal received and of corresponding portions of the sound signal emitted, and obtaining acoustic parameters of the environment on the basis of the impulse response.

Abstract: A thermal insulation product based on mineral wool, characterized in that the fibers have a micronaire of less than 10 l/min, preferably less than 7 l/min and especially between 3 and 6 l/min, and in that the material has a thermal conductivity of less than 31 mW/m·K, especially less than 30 mW/m·K. The parameters for obtaining this product are in particular the pressure of the burner, the rotation speed of the fiberizing spinner and the daily fiber output per spinner orifice.

Abstract: The invention relates to a process for the preparation of a shaped composite, comprising the preparation of a mixture into which fragments of mineral wool comprising a size comprising a sugar, a non-cement silica carrier distinct from the wool, a non-cement alkali metal carrier distinct from the wool, and water, are introduced, the non-cement silica carrier and the non-cement alkali metal carrier forming, with the water, a mineral binder which gradually solidifies around the solid particles present in the mixture, and then the shaping of the mixture into a shaped composite, in particular into briquettes. The invention also relates to a process for the manufacture of mineral wool, in which a molten mass is produced which is converted into mineral wool by means of a fiberizing device, the shaped composite being introduced as vitrifiable charge into a melting chamber, such as a cupola furnace.

Abstract: The invention relates to a thermal insulation product based on mineral wool comprising mineral fibers, the product comprising two main faces and longitudinal and transverse edges perpendicular to the main faces, the product being characterized by the following orientation fractions: a longitudinal orientation fraction greater than or equal to 48%, or even 50%, along an angle of more or less 6° with respect to the plane of the main faces, when the mineral fibers are counted only in a longitudinal cross-section, and a mean orientation fraction greater than or equal to 40%, or even 45%, along an angle of more or less 6° with respect to the plane of the main faces, when the mineral fibers are counted both in a transverse cross-section and in a longitudinal cross-section. The invention allows the insulating power of a thermal insulation product based on mineral wool to be improved without increasing its thickness.

Abstract: A process for manufacturing insulating products based on mineral wool includes applying, on mineral wool fibers, a binding composition containing (a) at least one carbohydrate selected from reducing sugars, non-reducing sugars, hydrogenated sugars, and a mixture thereof, and (b) at least one crosslinking agent for crosslinking the carbohydrate(s). The process also includes evaporating the solvent phase of the binding composition and thermal curing the non-volatile fraction of the composition. Further, added to the binding composition, preferably immediately before the application thereof on the mineral wool fibers, is an oil-in-water emulsion including water, a mineral oil, at least one nonionic surfactant and a water-soluble polysaccharide. The mean diameter of the oil droplets of the stable oil-in-water emulsion, determined by laser diffraction particle size analysis, is greater than 5 ?m.

Abstract: The invention relates to a thermal insulation product based on mineral wool comprising mineral fibers, the product comprising two main faces and longitudinal and transverse edges perpendicular to the main faces, the product being characterized by the following orientation fractions: a longitudinal orientation fraction greater than or equal to 48%, or even 50%, along an angle of more or less 6° with respect to the plane of the main faces, when the mineral fibers are counted only in a longitudinal cross-section, and a mean orientation fraction greater than or equal to 40%, or even 45%, along an angle of more or less 6° with respect to the plane of the main faces, when the mineral fibers are counted both in a transverse cross-section and in a longitudinal cross-section. The invention allows the insulating power of a thermal insulation product based on mineral wool to be improved without increasing its thickness.